Alterations in the hippocampus were evident across psychotic disorders. 2 key findings →
Design: case-control study Participants: 219 Evidence: moderate
Full summary, score breakdown and related studies → Original source
27,380 Alzheimer's and dementia studies in plain English, each scored out of 100.
Alterations in the hippocampus were evident across psychotic disorders. 2 key findings →
Design: case-control study Participants: 219 Evidence: moderate
Full summary, score breakdown and related studies → Original source
Patients with AD have altered microvascular network in the retina (narrower retinal venules and a sparser and more tortuous retinal vessels) compared with matched nondemented controls. 3 key findings →
Design: case-control study Participants: 136 Evidence: moderate
Full summary, score breakdown and related studies → Original source
The analysis of the comorbidities associated with an index disease (e.g., dementia) must not be exclusively based on prevalence rates, but rather on methodologies that allow the discovery of non-random associations between diseases. 4 key findings →
Design: cross-sectional Participants: 72,815 Evidence: moderate
Full summary, score breakdown and related studies → Original source
Methylthioninium (MT) is a tau aggregation inhibitor with therapeutic potential in Alzheimer's disease (AD). 1 key finding →
Design: clinical trial Evidence: low
Full summary, score breakdown and related studies → Original source
Combining multi-modality brain data for disease diagnosis commonly leads to improved performance. 1 key finding →
Evidence: low
Full summary, score breakdown and related studies → Original source
We also assessed the rates in patients with other significant medical, neurologic, or mental comorbid illness. 3 key findings →
Design: cross-sectional Participants: 652,378 Evidence: low
Full summary, score breakdown and related studies → Original source
This JAMA clinical review synthesizes cohort studies and meta-analyses to give physicians practical guidance on recognizing, assessing, and treating caregiver burden. 4 key findings →
Design: systematic-review Evidence: moderate
Full summary, score breakdown and related studies → Original source
Levels of DDE were 3.8-fold higher in the serum of those with AD (mean [SEM], 2.64 [0.35] ng/mg cholesterol) when compared with control participants (mean [SEM], 0.69 [0.1] ng/mg cholesterol; P Conclusions and relevance Elevated serum DDE levels are associated with an increased risk for AD and carriers of an APOE4 ε4 allele may be more susceptible to the effects of DDE. 2 key findings →
Design: case-control study Participants: 20 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
The 4AT is a new test for rapid screening of delirium in routine clinical practice. 1 key finding →
Participants: 29 Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Agreement for detection of SS was excellent (unweighted κ of 0.81). 2 key findings →
Design: longitudinal study Participants: 809 Evidence: moderate
Full summary, score breakdown and related studies → Original source Full text may need a subscription
Cardiovascular autonomic dysfunction, REM sleep behavior disorder, color discrimination ability, and gait dysfunction strongly predict development of dementia in Parkinson disease. 1 key finding →
Participants: 80 Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
The Systolic Blood Pressure Intervention Trial will provide important information on the risks and benefits of intensive blood pressure treatment targets in a diverse sample of high-risk participants, including those with prior cardiovascular disease, chronic kidney disease, and those aged ≥75 years. 4 key findings →
Participants: 9,361 Evidence: high
Full summary, score breakdown and related studies → Original source Free full text
Patients with moderate to severe AD presented with higher mean (SD) orexin levels compared with controls (154.36 [28.16] vs 131.03 [26.55]; P Conclusions and relevance Our results demonstrate that, in AD, increased cerebrospinal fluid orexin levels are related to a parallel sleep deterioration, which appears to be associated with cognitive decline. 2 key findings →
Design: case-control study Participants: 48 Evidence: moderate
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Human neurons are functional over an entire lifetime, yet the mechanisms that preserve function and protect against neurodegeneration during ageing are unknown. 5 key findings →
Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Depressive symptoms in MCI appear to be predictors for progression to AD. 3 key findings →
Design: longitudinal study Participants: 74 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
Guidelines recommend screening stroke-survivors for cognitive impairments. 4 key findings →
Design: case-control study Evidence: moderate
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Because of the aging population and a rise in the number of stroke survivors, the prevalence of post-stroke cognitive impairment (PSCI) is increasing. 4 key findings →
Design: cohort study Participants: 280 Evidence: moderate
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Delirium is a profound neuropsychiatric disturbance precipitated by acute illness. 4 key findings →
Design: longitudinal study Participants: 465 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
Cognitive impairment is one of the earliest, most common, and most disabling non-motor symptoms in Parkinson's disease (PD). 4 key findings →
Design: cohort study Participants: 360 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
This study indicates no benefits for memantine in the long-term treatment and prophylaxis of clinically significant neuropsychiatric symptoms. 5 key findings →
Participants: 199 Evidence: high
Full summary, score breakdown and related studies → Original source Free full text
Clinicopathological evidence suggests that the pathology of Alzheimer's disease (AD) begins many years before the appearance of cognitive symptoms. 3 key findings →
Design: cross-sectional Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
In a middle-aged, at-risk cohort, a physically active lifestyle is associated with an attenuation of the deleterious influence of age on key biomarkers of AD pathophysiology. 3 key findings →
Design: cross-sectional Participants: 186 Evidence: high
Full summary, score breakdown and related studies → Original source Free full text
Resting-state functional connectivity magnetic resonance imaging changes with progressing AD severity are similar between ADAD and LOAD. 2 key findings →
Design: cross-sectional Participants: 79 Evidence: moderate
Full summary, score breakdown and related studies → Original source Free full text
23% of the total global burden of disease is attributable to disorders in people aged 60 years and older. 5 key findings →
Evidence: low
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This report discusses the public health impact of Alzheimer's disease (AD), including incidence and prevalence, mortality rates, costs of care, and overall effect on caregivers and society. 2 key findings →
Participants: 200,000 Evidence: low
Full summary, score breakdown and related studies → Original source Free full text
Free full text links and the Full text may need a subscription label come from Unpaywall, Europe PMC and OpenAlex records of free copies, checked 10 Oct 2026. A study with neither is unknown, not paywalled. Show only studies that are free to read
This is alzhub's own score. It is not an official metric, not an impact factor, and no journal, publisher or ranking body endorses it. We built it so that a reader who is not a scientist can tell a landmark trial from a conference abstract without having to already know the difference. Every point comes from one of 20 components, all of them printed on the study itself, so you can disagree with our arithmetic rather than having to trust the total.
Journals are placed in ordered tiers, never given a numeric impact factor — we could not verify current impact factors from a source we control, and an invented one would be worse than none. Tier 1 is the top-tier general journals (NEJM, The Lancet, JAMA, Nature, Science, Nature Medicine); tier 2 is the leading specialty journals; tier 3 is every other peer-reviewed journal. A separate part scores how much the journal's own papers are cited, which tells the tier-3 journals apart.
Two rules we don't bend. First, we never fill in a missing value: if a record does not state a sample size or a design, that component scores zero, and if we simply have no data for a part, such as a citation count, that part is left out and the study is scored on the parts we could check. The study card says which. Second, anything that is not a peer-reviewed article is capped at 16/100 and carries a warning chip — so a conference abstract or a company press release can never outrank a peer-reviewed paper, no matter how good it looks.
We rank a rigorous null result — a good trial showing that something does not work — above an early positive finding. Someone deciding whether to buy a supplement is served by that, and the rigour is already counted by the design and journal components.
The score is computed from the published data alone and is reproducible: the same file always yields the same numbers.
See the whole rubric drawn out → — four charts covering all 27,380 studies: how the scores are spread and where the cap bites, which of the 20 components the library is strong and weak on, which subjects rest on stronger evidence, and what kinds of study each subject is actually built from.
This is a large sample of the Alzheimer's literature, not an exhaustive index of it. It holds 27,380 records, built mostly from automated pulls of Europe PMC (60.6% of the library) and OpenAlex (18.6%), plus smaller pulls from PubMed, Crossref and medRxiv. If a study, a drug, or a finding isn't here, that is not evidence it doesn't exist in the literature — it may simply not have been pulled in yet.
1,032 records (3.8% of the library) are not peer-reviewed — 962 of those are preprints posted before any journal review, and the rest are conference abstracts, regulatory notices and reports. Every study card on this page states its status plainly, and the score above is capped for anything that isn't a peer-reviewed article.
See the full, machine-readable breakdown of this library's coverage →